HomeMy WebLinkAbout2012 CON Palm Engineering - Change Order #1- Drainage Improvements ProjectCALIFORNIA —44
NkTIONA CITY
I tY
orcoBPow as.
DRAINAGE PROJECT, FY 11-12
Specification No. 11-07
Contractor: Palm Engineering and Construction, Inc.
CHANGE ORDER NO. 1
May 8, 2012
Reason/Purpose for this Change Order:
After potholing utilities on D Street is was determined that there is an existing high pressure gas main at 5th
Street that will not have enough cover once the work is complete. SDG&E has investigated and determined that
they will allow a deviation if concrete protection is provided over the top of the gas main in conformance with their
attached standard drawingfor any location with less than 32" of cover.
The City of National City and Contractor agree to the following change to the original Contract:
The Contractor agrees to install a concrete cover over the top of the existing high pressure gas main on D Street
at 5th Street in conformance with the SDG&E specifications, procedures and the attached drawing where there
will be less than 32" of cover from the final surface improvements. Contractor shall coordinate all work with
SDG&E and document ail work and utilities on their As -Built drawings. The price shall be $30 per lineal foot of I
concrete cap place and shall include the cost of all work, overhead and profit involved in placing the concrete cap,
and preparing each location to accept the final improvements. The estimated amount of lineal footage needed is
60 feet. As the gas main is exposed the actual footage shall be determined by the Contractor, SDG&E and the
inspector. Another change order shall be issued to adjust the price of this extra work for actual footage placed.
Original Contract Amount $ 187,212.90
Net change by previously authorized Change Orders
Subtotal
187,212.90
Amount of this change order 1,800.00
New contract amount $
Working days added: 5 Working days subtracted: 0 Percent change in Contract to date 0.96%
189, 012.90
!Submitted by:
City Manager, required for Change Orders >$24,999 Date
By signing this Change Order the Contractor confrms that he/she is completely familiar with its terms and conditions and has fairly negotiated
its price, terms and conditions. If this Change Order is approved, Contractor will provide all of the equipment, materials and labor necessary to
provide a complete work as described above at that the price stated herein. Additionally, Contractor confirms that the price is fair and complete
and represents all costs associated with the work, including but not limited to all equipment, materials, labor, supervision, overhead, fees,
bonds, insurance, profit, etc. and that there will be no further compensation. All of the terms and conditions of the original contract documents
are incorporated herein.
Accepted and agreed to by Pal rr�_Engine e 'ng and Construction, Inc.:
Name:
Date
Note to Contractor: If you do not agree with this Change Order you may be directed to proceed with this work under the terms of the contract
and you may proceed under protest. You must comply with the contract requirements of submitting a written protest to protect your claim.
Originals: City Clerk, Contractor cc: Engineering project file, Project Manager
1243 National City Boulevard, National City, CA 91950 Telephone (619) 336-4380
,
THIS DRAWING SHOWS THE TYPICAL INSTALLATION OF A CONCRETE PROTECTIVE SLAB FOR A GAS DISTRIBUTION MAIN
WHERE MINIMUM COVER CANNOT BE OBTAINED DUE TO FIELD CONFLICTS.
3W
FINAL GRADE
fPTDTN q
FINAL GRADE
30. MIN 42' MAX.
row-
INSTALATION;
A. CONCRETE PROTECTIVE SLAB WILL ONLY BE USED AS A LAST RESORT.
B. REGARDLESS OF PIPE SIZE OR TRENCH WIDTH, ALL SLABS SHALL PROJECT INTO NATIVE SOIL 6 INCHES OUTSIDE OF TRENCH
WALLS.
C. PROTECTIVE SLAB SHALL BE A MINIMUM THICKNESS OF 4 INCHES WITH 6 SACK CONCRETE WITH WELDED WIRE FABRIC
(4' MESH) OR 6 INCHES WITH 6 SACK CONCRETE.
D. A 2 INCH PEAK IN THE CONCRETE SLAB IS NECESSARY FOR SLAB DISTINCTION. SOIL BETWEEN THE CONCRETE SLAB AND THE
STREET CONCRETE BASE IS ALSO NECESSARY FOR DISTINCTION BETWEEN THE STREET (OR ALLEY) AND THE PROTECTIVE SLAB.
E. IF EXISTING GRADE IS TO BE CUT, TRENCHING BY HAND IS REQUIRED FOR PROTECTION OF THE PIPE AND/OR WRAPPING. A
3' MIN. TO A 6' MAX. CLEARANCE BETWEEN TOP OF PIPE AND SLAB WITH APPROVED SHADING IS REQUIRED.
F. FOR DEPTHS LESS THAN 18 INCHES, CONSULT GTS MIRAMAR.
G. SPECIAL CONDITIONS:
•
SECTION
MATERIAL
_6• _IB'_� 6'
PROTECTION MM PROTECTION
C0 RETE
PROTECTIVE
SLAM
3'
f
I8' MIN.
A PROTECTIVE SLAM
fi
Go%
[-it
B
GAS MAIN
THOMAS BROS#
APPROVED FOR DPSS#
DATE
APPROVED BY:
A le Sempra Energy oft
CONCRETE PR❑TECTIVE SLAB
FOR SHALLOW GAS MAIN
OFFICE OF THE CITY CLERK
1243 National City Blvd.
National City, California 91950
Michael R. Dalla, CMC - City Clerk
619-336-4228 phone / 619-336-4229 fax
Palm Engineering & Construction
Change Order No. 1
Drainage Improvements Project, FY 11-12
Judy Hernandez (Engineering)
Forwarded Copy of Change Order to Contractor